Hey, everyone. I've had an HD500 for about a year and a half and recently the tap/tuner button started misfiring. What I mean is that sometimes when I press it once, it registers as two times, making the tempo insanely fast. Also sometimes when I hold it down and it goes to tuner, it will register contact, when I release it, so then it exits tuner mode. Is there anything I can try to do before sending it in for repair? Any ideas would be appreciated.

I've had two HD500s do the same thing to me and they both needed a new tac switch. I tried resetting the firmware and everything but it was a hardware issue. I ended up using an external tuner so I wouldn't use the tap/tuner button so often.

Thanks for all the replies, everyone! The I uses the tap for tempo quite a bit, so I definitely need to get this resolved. I just noticed that the other bottom buttons have the same problem. It doesn't matter much when switching patches, but if I use the looper, it can cause some problems. I'm thinking it may be the bottom circuitboard, so it looks like I'll have to send it in for repairs.